Select the second option by typing 2 and pressing enter. This will give you a
template to use to create a configuration file containing your AWS credentials,
cluster settings, etc. The next step is to customize this file using your
favorite text-editor:

$ vi ~/.starcluster/config

This file is commented with example “cluster templates”. A cluster template
defines a set of configuration settings used to start a new cluster. The
example config provides a smallcluster template that is ready to go
out-of-the-box. However, first, you must fill in your AWS credentials and
keypair info: